Improvement in fanning-mills



2 Sheets-Sheet 1.

J.: BENNETT. Fanning-Mill.

Patented April 29, 1879 N. PETERS, PHOTD-UYHOGRAFHER, WASMNGTON, D. C.

2 Sheets--Sheet 2.

' J BENNETT. Fanning-Mill. v

Patented April 29, 1879,

N PETERS. PHOTO-LITHOGRAFHER. WASHINGTON o c.

. machine as a whole.

UNITED STATES; PATENT OFFICE.

JOHN BENNETT, OF BELLEVILLE, ONTARIO, CANADA.

IMPROVEMENT IN FANNlNG-MILLS.

Specification forming part of Letters Patent No. 214,805, dated April29, 1879 application filed January 26, 1878.

To all whom it may concern:

Be it known that I, JOHN BENNETT, of Belleville, in the county ofHastings and- Province of Ontario, in the Dominion of Canada,haveinvented certain new and useful Improvements pertaining toFanning-Mills, of which the following is a specification, referencebeing had to the accompanying drawings, where- Figure l is a view of afanning-mill embodying my improvements in central vertical section. Thefan and adjacent parts, being of the common construction, are omitted.Fig. 2 is a view of the mill from the rear end, with a portion of one ofthe stanchions represented as broken away, in order to show the thumbnutwhich secures one endof the lifting-bar. Fig. 3 is a side view of theshoes and their suspension-straps. Fig. 4 shows a face view of animproved crank-diskfor giving vibratory motion to the shoes.

The letter a denotes the frame or case of the 1) denotes the hopper, andc the hopper gate. The hopper-gate bears on the back side the catch cl,into which meshes the conical worm-wheel e, borne on a short shaft, 0which finds a bearing in the crossgirt f, provided with the operatinghead or handle 0 By rotating this head or handle the hopper-gate may beadjusted to any desired degree of opening.

The letter g denotes the upper shoe, containing the sieve or screen h,andi thelower shoe. These shoes have a side-shake motion, which may becommunicated from the fan-shaft in the usual manner. The manner ofsuspending these shoes from the frame, so as to make the samesuspension-points answer for both shoes and yet leave each shoe free totake independent movements, is as follows: The letter j denotes one ofthe suspension-straps, starting from the frame and rnnnin g down. It isattached at j and j to the upper and lower shoes respectively. There aretwo of these suspension-straps j, one on each side of the shoes. Thematerial thereof is, preferably, spring-steel. The letters It It denotesuspension-straps, preferably of spring-steel, running from the insidesof the frame .to the outsides of the upper shoe. At this front end theupper and lower shoes are connected by the flexible connection-straps H.The material thereof is leather or the like. This allows the front endof the lower shoe to have a vertical movement independent of the uppershoe. There may well be the suspension-strapsmm, preferably ofspring-steel, located as shown.

The vertical movement of the front end of the lower shoe is given bymeans as follows: On the under side of the shoe 0' is a cross-bar, 6,having the depression or concavity i. This concavity rests on the rolla, which is hung on the lifting-bar 0. As the shoe shakes from side toside, the concavity 13",riding on and off the roll it, gives the shoe ajarring vertical movement. A boss or stud would answer in place of theroll, but the use of the roll avoids friction to a great degree. a

The lifting-bar 0 rests in a socket, 0, at one end. The other end. bearsa threaded pin or stud running through the frame and bearing on theoutside the thumb-nut p, by means of which this end of the lifting-barcan be secured at different elevations, the threaded pin passing througha mortise in the frame to al-' low of this adjusting movement.

The letters 4" denote washers with convexed or rounded sides interposedbetween the suspension-straps and the side of the frame or shoe. Thisconvexity retards the swinging or vibratory motion of thesuspension-straps less than a flat surface. The screws 8 attach thesuspension-straps and the washers to the frame and shoes, or they maysimply attach the suspension-straps to the washers, and the washersthemselves may be furnished with screws or pins for attachment to theframe and shoes.

The lower shoe has the screen 1., and, for purposes of separating grainsof different sizes, the screen a. In separating grains of differentsizes the larger grain takes the course donoted by arrow No. 1, andpasses down the screen u,'being delivered at the front of the machine.The smaller grain takes the course denoted by arrow No. 2, and passesdown the screen it, whence it falls into the trough c, which is attachedto screen t, and is delivered at the side of the machine. The letter 20denotes a wind-guard which prevents the blast from the fan from forcingthe grain back on the screen or screens behind it.

I show/in Fig. 4 an improved crank-disk, de-

signed to be fast on or rotated from the fanshaft, for giving areciprocating movement of greater or less extent to the shoes. Theconnecting-rod starts from a crank-pin borne in or on the end of the armat. The letter as denotes the rotary disk; 00, an arm pivoted at or nearthe periphery, and bearing at its extremity the crank-pin. The letter xdenotes a ratchet on the disk, located between the center of the diskand the pivot of the arm as. The

. arm w is correspondingly ratcheted on the under side, and the arm isheld at any desired adjustment on the ratchet by the bolt 00 runningthrough the arm 40 and the mortise m.

I claim as my invention- 1. As an improvement in grain-separators, aframe provided with projecting convex washers on its inner sides, incombination with suspension-straps supporting the shoe or shoes Withinsaid frame, when said straps are secured to'or upon said washers at therise or swell of their convex surface, substantially 'as and for thepurpose set forth.

2. Ina fanning-mill or grain-separator of the described'class, thecombination and arrangement of the upper shoe, 9, suspension-straps 7',having pivots j j,

lower shoe, 2, connecting-straps l, suspension-straps m, and brace orconnecting-straps k, as set forth.

3. The improved device for operating the lower hinged part of thedivided shoe gt, consisting in the combination, with the frame a andsection 1', provided with the cross-bar 1', having recess j, of thevertically-adjustable transverse bar 0, provided with the frictionrollern, as set forth.

4. In combination, the frame a, suspensionstraps on 7', brace orconnecting-straps 70, .divided shoe 9 i, provided on its under side withthe recessed bar '6, auxiliary connectingstraps l, andvertically-adjustable transverse bar 0, having roller n, all constructedand arranged to operate substantially as set forth.

5. In combination, the disk as, provided with rack x and slot 50", bothlocated between the periphery and center of the disk, the arm :0 pivotedat the periphery, and the bolt 40', as set forth.

In witness whereof I hereto set my hand.

JOHN BENNETT.

Witnesses WM. WEBSTER, WILLIAM THoMPsoN.

